In a war increasingly fought in the shadows, a claimed strike by Vladimir Putin’s forces on a hidden nerve center of Ukraine has sent shockwaves through the conflict, signaling a dangerous escalation beyond the traditional battlefield.

Several regions of Ukraine have endured a night of Russian drone and missile attacks targeting energy infrastructure, with the interior ministry reporting more than a million households without power.

Ukrainian forces said on Monday that they destroyed four Russian helicopters in the Belgorod region. Kyiv used US-provided HIMARS rockets to strike the aircraft, which included formidable Ka-52s. Ka-52s, used to attack ground targets, have been problematic ...

Moscow will give its blessing to a ceasefire only after Ukraine’s forces have withdrawn from the front line, Kremlin adviser Yuri Ushakov said in comments published Friday in Russian business daily Kommersant.

The cannon has a maximum rate of fire of 550 rounds a minute and can engage light-armored targets within a range of 1,500 meters (4,921 feet), soft-skinned targets and infantry at ranges of up to 4,000 meters (13,123 feet), and air targets flying at low ...

Significant Russian helicopter losses in the early months of the Russia-Ukraine war have led many to proclaim the end of rotary-wing aviation in combat, but a former US Army general and Bell executive argues it was just bad tactics and poor planning.